I agree with my colleagues re: success rates vary.

No this can be corrected and discussed at time of interview.

This can be corrected at time of interview.

No you can amend this at time of interview.

Yes but the conditional residency must be removed first.

The child must reach age 21 before being able to petition for parents.

As long as you have a valid LPR status, you should be permitted to return.

While not required, it is advisable to maintain status.

Your criminal history must be reviewed in detail to better advise.

Yes you may do so and will be traveling as a LPR.